mac80211: add missing CSA locking

The patch adds a missing sdata lock and adds a few
lockdeps for easier maintenance.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 27fa53b..875e63d 100644 (file)
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1053,6 +1053,7 @@ static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev,
        int err;
 
        sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+       sdata_assert_lock(sdata);
 
        /* don't allow changing the beacon while CSA is in place - offset
         * of channel switch counter may change
@@ -1080,6 +1081,8 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
        struct probe_resp *old_probe_resp;
        struct cfg80211_chan_def chandef;
 
+       sdata_assert_lock(sdata);
+
        old_beacon = sdata_dereference(sdata->u.ap.beacon, sdata);
        if (!old_beacon)
                return -ENOENT;
@@ -3002,6 +3005,8 @@ static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
        struct ieee80211_local *local = sdata->local;
        int err, changed = 0;
 
+       sdata_assert_lock(sdata);
+
        mutex_lock(&local->mtx);
        sdata->radar_required = sdata->csa_radar_required;
        err = ieee80211_vif_change_channel(sdata, &changed);
@@ -3083,7 +3088,7 @@ int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
        struct ieee80211_if_mesh __maybe_unused *ifmsh;
        int err, num_chanctx, changed = 0;
 
-       lockdep_assert_held(&sdata->wdev.mtx);
+       sdata_assert_lock(sdata);
 
        if (!list_empty(&local->roc_list) || local->scanning)
                return -EBUSY;

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index f01d468..b2da79f 100644 (file)
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -795,6 +795,8 @@ ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata,
        int err;
        u32 sta_flags;
 
+       sdata_assert_lock(sdata);
+
        sta_flags = IEEE80211_STA_DISABLE_VHT;
        switch (ifibss->chandef.width) {
        case NL80211_CHAN_WIDTH_5:

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 3dfd20a..8880bc8 100644 (file)
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -822,7 +822,9 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
        cancel_work_sync(&local->dynamic_ps_enable_work);
 
        cancel_work_sync(&sdata->recalc_smps);
+       sdata_lock(sdata);
        sdata->vif.csa_active = false;
+       sdata_unlock(sdata);
        cancel_work_sync(&sdata->csa_finalize_work);
 
        cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);

diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index bd55115..f70e9cd 100644 (file)
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -864,6 +864,8 @@ ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
        int err;
        u32 sta_flags;
 
+       sdata_assert_lock(sdata);
+
        sta_flags = IEEE80211_STA_DISABLE_VHT;
        switch (sdata->vif.bss_conf.chandef.width) {
        case NL80211_CHAN_WIDTH_20_NOHT: